He might learn about his family history. Kushina could have written about her Uzumaki clan heritage, which Naruto may not know much about. Also, he could find out about his parents' relationship, like how they fell in love.
Naruto could learn about his mother's love for him. Kushina's diaries might be filled with her hopes and dreams for Naruto, and how she always thought of him even before he was born. This would give Naruto a deeper understanding of his mother's love and sacrifice.
He could learn powerful sealing techniques. Kushina was known for her sealing skills, and she could pass them on to Naruto. This would give Naruto an advantage in battles and also in containing the Nine - Tails' power.
Yes, in some fanfictions, Naruto might read Kushina's diaries. This can be a very interesting plot device as it allows Naruto to learn more about his mother on a deeper level, her thoughts, her hopes, and her experiences. It can also be a way to add more emotional depth to the story, showing Naruto's reaction to his mother's words and how it might influence his growth and decisions in the fanfiction world.
It could be really interesting. Maybe Naruto would grow up with a different kind of family dynamic. He might be more involved in Uzumaki clan affairs from the start. His relationship with Jiraiya could also be different as his connection to the prophecy might be re - evaluated. And his rivalry with Sasuke could take on a whole new meaning, perhaps related more to clan differences rather than just personal strength.
Well, it could be a really strange plot. Maybe it involves some sort of time - travel or alternate universe where Naruto has to take on the role of Kushina's sensei in a very different ninja world setting, and the kiss could be a symbol of some deep - seated connection or a way to transfer power. But this is all just speculation as I haven't actually read such a fanfiction.
One trait could be her determination. Just as Kushina was determined to protect her village and her loved ones, Naruto has that same unwavering determination in his quests. In fanfiction, this could be shown in how he never gives up on a mission or a friend in need.
Well, she might face the challenge of Naruto's trust. Since she has been absent for so long, Naruto may not trust her immediately. Also, the ninja world is full of threats. There could be enemies who try to stop her from getting close to Naruto. And Naruto has his own sense of identity which is deeply rooted in being an orphan and a self - made ninja. Kushina has to respect that and find a way to fit into his life without disrupting it completely.
It could be that there is no traditional antagonist. The conflict might be internal, with Naruto's own emotions towards Kushina being the main source of drama.
Perhaps Naruto feels that Kushina is being overprotective. He wants to prove his independence and go on his own adventures without her constant supervision, so he decides to run away.
They would likely develop a complex relationship. On one hand, Kushina is his sensei, so there would be a sense of respect and authority. But on the other hand, Naruto knows she is his mother in the original story, so there might be an underlying emotional bond. It could be a relationship where Naruto looks up to Kushina as a mentor but also feels a deep connection that is different from a typical student - teacher relationship.
One consequence could be Naruto's emotional breakdown. Since Kushina is his mother, her betrayal would be a huge blow to him psychologically. He might start to doubt himself and his place in the world.